Tip Bank

You can apply operator dynamic_cast only to polymorphic objects (a polymorphic object is one that has at least one virtual member function). This is a requirement of the C++ standard.

Question: I have some orphaned Exchange mailboxes that are displayed under Private Information Store/Mailbox Resources. How do I remove them if the object is not defined in the DS? Answer:

Date variables store values in floating point format, much like Double variables, with the integer part for dates and the fractional part for the time portion. Being floating point values,

If you instantiate an ActiveX component from an ASP script under IIS 4 and previous versions, using the Server.CreateObject command, you might believe that the object is deallocated as soon

The standard DAO Data control is designed to work with the Jet 3.5 Engine, whereas Access 2000 database can be accessed only by the more recent Jet 3.6 engine. For

After you install Visual Basic and log on to the machine as a different user (with or without administrator privileges), you cannot see any Add-Ins in the Add-In dialog in

In SQL Server 6.5 and previous versions, the GROUP BY clause in a SELECT statement was carried out by temporarily sorting the resultset before grouping similar rows, therefore the end

If your ASP pages display strings stored in database fields, you should always process the strings with the Server.HTMLEncode method, otherwise the string won’t be displayed correctly in the user’s

A SELECT query returns all the rows for which the WHERE clause returns True. However, many developer – especially those accustomed to other programming languages, such as VB – get